diff --git a/libavcodec/jpeg2000.h b/libavcodec/jpeg2000.h
index d004c08f10..4bdc38df7c 100644
--- a/libavcodec/jpeg2000.h
+++ b/libavcodec/jpeg2000.h
@@ -37,12 +37,14 @@
 
 enum Jpeg2000Markers {
     JPEG2000_SOC = 0xff4f, // start of codestream
+    JPEG2000_CAP = 0xff50, // extended capabilities
     JPEG2000_SIZ = 0xff51, // image and tile size
     JPEG2000_COD,          // coding style default
     JPEG2000_COC,          // coding style component
     JPEG2000_TLM = 0xff55, // tile-part length, main header
     JPEG2000_PLM = 0xff57, // packet length, main header
     JPEG2000_PLT,          // packet length, tile-part header
+    JPEG2000_CPF,          // corresponding profile
     JPEG2000_QCD = 0xff5c, // quantization default
     JPEG2000_QCC,          // quantization component
     JPEG2000_RGN,          // region of interest
@@ -58,6 +60,12 @@ enum Jpeg2000Markers {
     JPEG2000_EOC = 0xffd9, // end of codestream
 };
 
+enum JPEG2000_Ccap15_b14_15_params {
+    HTJ2K_HTONLY = 0,      // HTONLY, bit 14 and 15 are 0
+    HTJ2K_HTDECLARED,      // HTDECLARED, bit 14 = 1 and bit 15 = 0
+    HTJ2K_MIXED = 3,       // MIXED, bit 14 and 15 are 1
+};
+
 #define JPEG2000_SOP_FIXED_BYTES 0xFF910004
 #define JPEG2000_SOP_BYTE_LENGTH 6
 
diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c
index 091931b1ff..d1046661c4 100644
--- a/libavcodec/jpeg2000dec.c
+++ b/libavcodec/jpeg2000dec.c
@@ -408,6 +408,73 @@ static int get_siz(Jpeg2000DecoderContext *s)
     s->avctx->bits_per_raw_sample = s->precision;
     return 0;
 }
+/* get extended capabilities (CAP) marker segment */
+static int get_cap(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c)
+{
+    uint32_t Pcap;
+    uint16_t Ccap_i[32] = { 0 };
+    uint16_t Ccap_15;
+    uint8_t P;
+
+    if (bytestream2_get_bytes_left(&s->g) < 6) {
+        av_log(s->avctx, AV_LOG_ERROR, "Insufficient space for CAP\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    Pcap = bytestream2_get_be32u(&s->g);
+    s->isHT = (Pcap >> (31 - (15 - 1))) & 1;
+    for (int i = 0; i < 32; i++) {
+        if ((Pcap >> (31 - i)) & 1)
+            Ccap_i[i] = bytestream2_get_be16u(&s->g);
+    }
+    Ccap_15 = Ccap_i[14];
+    if (s->isHT == 1) {
+        av_log(s->avctx, AV_LOG_INFO, "This is an HTJ2K codestream.\n");
+        // Bits 14-15
+        switch ((Ccap_15 >> 14) & 0x3) {
+            case 0x3:
+                s->Ccap15_b14_15 = HTJ2K_MIXED;
+                break;
+            case 0x1:
+                s->Ccap15_b14_15 = HTJ2K_HTDECLARED;
+                break;
+            case 0x0:
+                s->Ccap15_b14_15 = HTJ2K_HTONLY;
+                break;
+            default:
+                av_log(s->avctx, AV_LOG_ERROR, "Unknown CCap value.\n");
+                return AVERROR(EINVAL);
+                break;
+        }
+        // Bit 13
+        if ((Ccap_15 >> 13) & 1) {
+            av_log(s->avctx, AV_LOG_ERROR, "MULTIHT set is not supported.\n");
+            return AVERROR_PATCHWELCOME;
+        }
+        // Bit 12
+        s->Ccap15_b12 = (Ccap_15 >> 12) & 1;
+        // Bit 11
+        s->Ccap15_b11 = (Ccap_15 >> 11) & 1;
+        // Bit 5
+        s->Ccap15_b05 = (Ccap_15 >> 5) & 1;
+        // Bit 0-4
+        P = Ccap_15 & 0x1F;
+        if (!P)
+            s->HT_MAGB = 8;
+        else if (P < 20)
+            s->HT_MAGB = P + 8;
+        else if (P < 31)
+            s->HT_MAGB = 4 * (P - 19) + 27;
+        else
+            s->HT_MAGB = 74;
+
+        if (s->HT_MAGB > 31) {
+                av_log(s->avctx, AV_LOG_ERROR, "Available internal precision is exceeded (MAGB> 31).\n");
+            return AVERROR_PATCHWELCOME;
+        }
+    }
+    return 0;
+}
 
 /* get common part for COD and COC segments */
 static int get_cox(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c)
@@ -802,6 +869,15 @@ static int read_crg(Jpeg2000DecoderContext *s, int n)
     bytestream2_skip(&s->g, n - 2);
     return 0;
 }
+
+static int read_cpf(Jpeg2000DecoderContext *s, int n)
+{
+    if (bytestream2_get_bytes_left(&s->g) < (n - 2))
+        return AVERROR_INVALIDDATA;
+    bytestream2_skip(&s->g, n - 2);
+    return 0;
+}
+
 /* Tile-part lengths: see ISO 15444-1:2002, section A.7.1
  * Used to know the number of tile parts and lengths.
  * There may be multiple TLMs in the header.
@@ -965,6 +1041,14 @@ static int init_tile(Jpeg2000DecoderContext *s, int tileno)
             comp->roi_shift = s->roi_shift[compno];
         if (!codsty->init)
             return AVERROR_INVALIDDATA;
+        if (s->isHT && (!s->Ccap15_b05) && (!codsty->transform)) {
+            av_log(s->avctx, AV_LOG_ERROR, "Transformation = 0 (lossy DWT) is found in HTREV HT set\n");
+            return AVERROR_INVALIDDATA;
+        }
+        if (s->isHT && s->Ccap15_b14_15 != (codsty->cblk_style >> 6) && s->Ccap15_b14_15 != HTJ2K_HTONLY) {
+            av_log(s->avctx, AV_LOG_ERROR, "SPcod/SPcoc value does not match bit 14-15 values of Ccap15\n");
+            return AVERROR_INVALIDDATA;
+        }
         if (ret = ff_jpeg2000_init_component(comp, codsty, qntsty,
                                              s->cbps[compno], s->cdx[compno],
                                              s->cdy[compno], s->avctx))
@@ -2187,22 +2271,43 @@ static int jpeg2000_read_main_headers(Jpeg2000DecoderContext *s)
             if (!s->tile)
                 s->numXtiles = s->numYtiles = 0;
             break;
+        case JPEG2000_CAP:
+            if (!s->ncomponents) {
+                av_log(s->avctx, AV_LOG_ERROR, "CAP marker segment shall come after SIZ\n");
+                return AVERROR_INVALIDDATA;
+            }
+            ret = get_cap(s, codsty);
+            break;
         case JPEG2000_COC:
+            if (s->in_tile_headers == 1 && s->isHT && (!s->Ccap15_b11))
+                av_log(s->avctx, AV_LOG_WARNING, "COC marker is found in HOMOGENEOUS HT set\n");
             ret = get_coc(s, codsty, properties);
             break;
         case JPEG2000_COD:
+            if (s->in_tile_headers == 1 && s->isHT && (!s->Ccap15_b11))
+                av_log(s->avctx, AV_LOG_WARNING, "COD marker is found in HOMOGENEOUS HT set\n");
             ret = get_cod(s, codsty, properties);
             break;
         case JPEG2000_RGN:
+            if (s->in_tile_headers == 1 && s->isHT && (!s->Ccap15_b11))
+                av_log(s->avctx, AV_LOG_WARNING, "RGB marker is found in HOMOGENEOUS HT set\n");
             ret = get_rgn(s, len);
+            if ((!s->Ccap15_b12) && s->isHT)
+                av_log(s->avctx, AV_LOG_WARNING, "RGN marker is found in RGNFREE HT set\n");
             break;
         case JPEG2000_QCC:
+            if (s->in_tile_headers == 1 && s->isHT && (!s->Ccap15_b11))
+                av_log(s->avctx, AV_LOG_WARNING, "QCC marker is found in HOMOGENEOUS HT set\n");
             ret = get_qcc(s, len, qntsty, properties);
             break;
         case JPEG2000_QCD:
+            if (s->in_tile_headers == 1 && s->isHT && (!s->Ccap15_b11))
+                av_log(s->avctx, AV_LOG_WARNING, "QCD marker is found in HOMOGENEOUS HT set\n");
             ret = get_qcd(s, len, qntsty, properties);
             break;
         case JPEG2000_POC:
+            if (s->in_tile_headers == 1 && s->isHT && (!s->Ccap15_b11))
+                av_log(s->avctx, AV_LOG_WARNING, "POC marker is found in HOMOGENEOUS HT set\n");
             ret = get_poc(s, len, poc);
             break;
         case JPEG2000_SOT:
@@ -2252,9 +2357,14 @@ static int jpeg2000_read_main_headers(Jpeg2000DecoderContext *s)
                        "Cannot have both PPT and PPM marker.\n");
                 return AVERROR_INVALIDDATA;
             }
-
+            if ((!s->Ccap15_b11) && s->isHT)
+                av_log(s->avctx, AV_LOG_WARNING, "PPT marker is found in HOMOGENEOUS HT set\n");
             ret = get_ppt(s, len);
             break;
+        case JPEG2000_CPF:
+            // Corresponding profile marker
+            ret = read_cpf(s, len);
+            break;
         default:
             av_log(s->avctx, AV_LOG_ERROR,
                    "unsupported marker 0x%.4"PRIX16" at pos 0x%X\n",
diff --git a/libavcodec/jpeg2000dec.h b/libavcodec/jpeg2000dec.h
index d0ca6e7a79..326a572722 100644
--- a/libavcodec/jpeg2000dec.h
+++ b/libavcodec/jpeg2000dec.h
@@ -112,6 +112,13 @@ typedef struct Jpeg2000DecoderContext {
     Jpeg2000Tile    *tile;
     Jpeg2000DSPContext dsp;
 
+    uint8_t         isHT; // HTJ2K?
+    uint8_t         Ccap15_b14_15; // HTONLY(= 0) or HTDECLARED(= 1) or MIXED(= 3) ?
+    uint8_t         Ccap15_b12; // RGNFREE(= 0) or RGN(= 1)?
+    uint8_t         Ccap15_b11; // HOMOGENEOUS(= 0) or HETEROGENEOUS(= 1) ?
+    uint8_t         Ccap15_b05; // HTREV(= 0) or HTIRV(= 1) ?
+    uint8_t         HT_MAGB; // MAGB value
+
     /*options parameters*/
     int             reduction_factor;
 } Jpeg2000DecoderContext;
